Procedural modelisation plugins in C++

I want to create procedural modelisation plugins in C++... how can I do ? actually, I can only open a "Hello World" message box in XSI... frustrating...
I'm looking for the author of the "SuperQuadric" plugin(available on this site) - does anybody know him ?

I've found two sample projects on the japanese softimage site... they're a good starting point if you're developing plugins in visual c++...

http://www.avid.co.jp/softimage/xsi\_sdk/sa...sdk\_visualc.htm

thanx ray - nice link -
I've downloaded your C++ "XSIEdgeTools" plugin too...
now let's learn...

I just looked into the superquadric plugin.. It's implemented as a compiled operator -so it would be better to use the splatter sample as a starting point...(c:softimagexsi_2.03xsisdkexamplessplatter)